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LQB182 EXAM QUESTIONS AND ANSWERS| VERIFIED
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  • Course
  • LQB182
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  • Kaplan University

The reactivity of an atom arises from Correct Answer: the existence of unpaired electrons in the valence shell. Covalent bonds differ from ionic and metallic bonds because in covalent bonding Correct Answer: pairs of electrons are shared Water contains 2 atoms of hydrogen and 1 atom of oxyg...

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  • November 3, 2022
  • 5
  • 2022/2023
  • Exam (elaborations)
  • Questions & answers

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  • lqb182 exam questions and answers| verified

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  • Kaplan University
  • LQB182
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LQB182 EXAM QUESTIONS AND ANSWERS| VERIFIED
The reactivity of an atom arises from Correct Answer: the existence of unpaired electrons in the
valence shell.

Covalent bonds differ from ionic and metallic bonds because in covalent bonding Correct
Answer: pairs of electrons are shared

Water contains 2 atoms of hydrogen and 1 atom of oxygen. What bond type holds these together
Correct Answer: Covalent boding

True or False? Polymerisation of monomers occurs due to covalent bonding between monomer
units Correct Answer: True

The simplest hydrocarbons are comprised of _________. Correct Answer: hydrogen and carbon

Carbohydrates, Proteins, and DNA have monomers of _______. Correct Answer:
monosaccharide, amino acid, and nucleotide, respectively.

True or False. Non-polar molecules are hydrophilic? Correct Answer: FALSE

What parts of the amino acids Y and Z are involved in the formation of a peptide bond? Correct
Answer: carboxyl group of Y and amino group of Z

A disulphide bridge can form between which of the same two amino acid residues? Correct
Answer: Cysteine

Polypeptide chains are formed from amino acid monomers via the process of ________. Correct
Answer: dehydration

An alpha-helix is a type of what level of protein structure? Correct Answer: Secondary structure

Which of the following statements is true about proteins? Correct Answer: True 3D structure is
revealed upon binding with a target

A dipeptide has ________. Correct Answer: two amino acids and one peptide bonds

The breakdown of polymers into their individual monomers _________. Correct Answer:
requires a water molecule for every bond broken

True or False. The term "insoluble fibre" relates to amylopectin. Correct Answer: F

True or False. Phospholipids contain hydrophobic tails that attract water molecules. Correct
Answer: F

, Hydrophobicity of fatty acids is due to long hydrocarbon tails with nonpolar covalent bonds.
Correct Answer: T

True or False. Triglycerides and triacylglycerol molecules are the same thing. Correct Answer:
T

What are the four main parts of a triglyceride? Correct Answer: Glycerol and three fatty acids

What is not permeable across the phospholipid bilayer of a cell? Correct Answer: Carbohydrate
monomers

A peptide bond is analogous to which of the following in carbohydrates? Correct Answer: a
glycosidic linkage

What does the penultimate carbon of a monosaccharide inform us regarding the type of
monomer? Correct Answer: Whether it is an L- or D- orientation

True or False. Phospholipids and triglycerides both have a glycerol backbone. Correct Answer: t

Covalent & ionic bonds are weaker than hydrogen bonds & dipole-dipole forces. Correct
Answer: f

True or False. Cellulose is predominant in plants and chitin in animals and fungi. Correct
Answer: t

A sugar monomer has six carbons and is therefore a ________. Correct Answer: Hexose

What are "saturated fats" saturated with? Correct Answer: Hydrogen

Dyneins interact with what fibres? Correct Answer: Microtubules

Peroxisomes are known to produce what? Correct Answer: Hydrogen peroxide

A macrophage will engulf and kill a bacteria through a process of: Correct Answer:
phagocytosis

Both prokaryotes and eukaryotes have which of the following: Correct Answer: cytoskeleton,
chromosomes, plasma membrane

Cell motility and contraction is mediated through: Correct Answer: actin

A symport transports two molecules in the same direction across the cell membrane. Correct
Answer: t

An antiport transports two molecules in opposite directions across the cell membrane. Correct
Answer: t

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